Arena.
Two sets of twenty-four in the void. A breath between. Your numbers at the end.
Hold to arm
Five modes
Each measures one thing. The ghost races you if you ask. These runs rank.
A browser aim trainer that measures honestly
Most aim trainers hand you a score with no error bars. PulsarMS re-scores every run server-side from raw telemetry and shows it as same-setup relative — the engine adds a frame of latency the bare reaction time test doesn't, and we say so. Each of the five modes isolates one well-studied slice of performance:
Flick Grid
AIM · FITTSFlick aiming — snapping the crosshair to targets that pop across the grid. Scored by Fitts's-law throughput (bits/s), which counts speed and accuracy together instead of letting you trade one for the other.
Good for: FPS players drilling target acquisition, and anyone measuring raw pointing speed.
Lock-On
TRACK · PURSUITSmooth tracking — gluing the reticle to a target that won't hold still. Scored by time-on-target: the share of the round your crosshair stayed inside the moving mark.
Good for: Tracking-heavy shooters, and pursuit-control practice.
Snap Decision
CHOICE · HICKChoice reaction — read the cue, hit the right zone, right now. It reads out an EZ-diffusion estimate of how fast you gather evidence, separate from how cautious you are.
Good for: Decision-speed training and Hick's-law choice-time curiosity.
Bomb Squad
GO / NO-GOImpulse control — cut the wire on go, hold on the bomb. Signal-detection theory (d′) separates how cleanly you tell go from no-go from how trigger-happy you are.
Good for: Anyone training the brake, not just the gas — pre-firing discipline.
Focus
FLANKERAttention under noise — answer the centre arrow with the ← → keys while the flankers scream the opposite. The Eriksen flanker task, measuring focus when distractors fight you.
Good for: Concentration training and selective-attention practice.
New here? Build a clean baseline on the reaction time test first, then read how we measure to see why every arena number carries a ± band and stays training-grade.
Practice here. Rank there.
Sessions on this page are practice and never touch the board. The five modes above are where a run counts.
Flick Grid
AIM · FITTSRanked by throughput (bits/s). No ranked runs yet.
Every run is re-scored server-side from raw telemetry and screened for implausible cursor paths and timing. Ranks are provisional — the score anchors are being calibrated against a pilot, so positions may shift. See how we measure.